What does your oesophagus do? How long is your small intestine? Which part of your body stores the goodness from food? Find out how the digestive system works and how to keep it healthy in this brilliant comprehensive introduction to the human body. Packed with photographs and diagrams, fascinating facts and activities to complete, this is the perfect hands-on guide to how the human body works. Written and checked by experts, it uses clear and simple explanations making complex ideas easy to understand, and features a glossary to explain tricky terms, as well as parents and teachers' notes to help take the learning further.